SIP Returns: Understanding CAGR, Absolute, and XIRR
Understand how SIP returns are calculated. Learn the difference between absolute returns, CAGR, and XIRR for recurring investments.
Calculating returns on a Systematic Investment Plan (SIP) is more complex than evaluating a flat lump-sum. Because you deposit funds at different times, standard metrics like CAGR can be misleading. Financial platforms use XIRR to compute real annualized returns.
Formula & Math Principles
XIRR solves for the internal rate of return r that sets the net present value (NPV) of all cash flows to zero:
How to Calculate (Step-by-Step)
To calculate and analyze your actual SIP returns:
- Absolute Return measures simple profit (Total Gain / Total Invested * 100), but ignores the time value of money.
- CAGR works for flat single-deposits but fails for recurring payments.
- XIRR tracks every individual monthly cash outflow, solving for the true annualized rate.
Practical Examples & Scenarios
Calculated Returns Analysis
Investing $1,000 annually at the start of each year for 3 years, finishing with a portfolio value of $3,500.
While the absolute profit is 16.67% ($500 gain on $3,000), the annualized XIRR rate is 9.63%, representing the actual rate of interest earned.
Expected SIP Maturity Scenarios: $300/Month
| Rate | 5 Years (Invested: $18k) | 10 Years (Invested: $36k) | 15 Years (Invested: $54k) |
|---|---|---|---|
| 8% Return | $22,185 | $55,108 | $103,810 |
| 10% Return | $23,425 | $61,525 | $124,352 |
| 12% Return | $24,746 | $68,823 | $149,936 |
| 14% Return | $26,151 | $77,117 | $181,707 |
Common Pitfalls & Mistakes
- Using simple CAGR formulas to estimate returns on a monthly systematic plan.
- Focusing on short-term absolute returns during market adjustments.
Frequently Asked Questions
Why is XIRR used for SIPs?
Because you make multiple deposits at different dates. XIRR is the standard way to calculate annualized returns for variable cash flows.
What return rate should I assume for equity SIPs?
A realistic long-term return rate for equity index funds is 10% to 12% annually, adjusted for volatility.
Conclusion
Using the correct metrics like XIRR ensures you have a realistic view of your portfolio's growth.
Ready to calculate your own numbers?
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